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14k yellow gold 4mm CZ flat back labret with martini prong setting, angled product view
CZ prong flat back studs worn on model's ear showing 2mm, 2.5mm, 3mm, and 4mm size comparison
4mm CZ prong-set flat back labret shown in model's medusa piercing, front face view
Flat back labret sizing guide showing 18G and 16G gauges from 5mm to 9.5mm with ear piercing map
14k yellow gold 4mm CZ labret shown in four barbell lengths: 5mm, 6mm, 8mm, and 9.5mm side by side
Round stone size comparison from 1.5mm to 4mm shown on fingertip, highlighting 3mm scale
14k yellow gold CZ flat back labret in five sizes from 2mm to 4mm, angled comparison view
14k gold 4mm diamond stud worn on model's earlobe with matching studs stacked in cartilage piercings
14k white gold 4mm CZ flat back labret, straight side profile showing post length and disc backing
14k white gold 4mm CZ martini-set flat back labret with CZ facing forward, angled view
Diagram comparing 16G and 14G threaded end versus 18G threadless push-pin closure styles in yellow gold
Four-step visual guide for inserting and removing an 18G threadless push-pin flat back labret
14k white gold 4mm CZ flat back labret disassembled, showing threaded CZ end separated from post
Close-up top-down view of 4mm CZ in martini prong setting, highlighting stone sparkle and four prongs
14k white gold 4mm CZ flat back labret with martini prong setting, angled product view
14k rose gold 4mm CZ flat back labret with martini prong setting, angled product view
14k yellow gold 4mm CZ flat back labret with martini prong setting, angled product view
CZ prong flat back studs worn on model's ear showing 2mm, 2.5mm, 3mm, and 4mm size comparison
Video thumbnail
Video thumbnail
4mm CZ prong-set flat back labret shown in model's medusa piercing, front face view
Flat back labret sizing guide showing 18G and 16G gauges from 5mm to 9.5mm with ear piercing map
14k yellow gold 4mm CZ labret shown in four barbell lengths: 5mm, 6mm, 8mm, and 9.5mm side by side
Round stone size comparison from 1.5mm to 4mm shown on fingertip, highlighting 3mm scale
14k yellow gold CZ flat back labret in five sizes from 2mm to 4mm, angled comparison view
14k gold 4mm diamond stud worn on model's earlobe with matching studs stacked in cartilage piercings
14k white gold 4mm CZ flat back labret, straight side profile showing post length and disc backing
14k white gold 4mm CZ martini-set flat back labret with CZ facing forward, angled view
Diagram comparing 16G and 14G threaded end versus 18G threadless push-pin closure styles in yellow gold
Four-step visual guide for inserting and removing an 18G threadless push-pin flat back labret
14k white gold 4mm CZ flat back labret disassembled, showing threaded CZ end separated from post
Close-up top-down view of 4mm CZ in martini prong setting, highlighting stone sparkle and four prongs
14k white gold 4mm CZ flat back labret with martini prong setting, angled product view
14k rose gold 4mm CZ flat back labret with martini prong setting, angled product view
Home 4mm Cubic Zirconia Low-Set Prong 14k Gold Flat Back Earring

4mm Cubic Zirconia Low-Set Prong 14k Gold Flat Back Earring

$176 $328 Est. Retail Value
14k yellow gold 4mm CZ flat back labret with martini prong setting, angled product view
CZ prong flat back studs worn on model's ear showing 2mm, 2.5mm, 3mm, and 4mm size comparison
4mm CZ prong-set flat back labret shown in model's medusa piercing, front face view
Flat back labret sizing guide showing 18G and 16G gauges from 5mm to 9.5mm with ear piercing map
14k yellow gold 4mm CZ labret shown in four barbell lengths: 5mm, 6mm, 8mm, and 9.5mm side by side
Round stone size comparison from 1.5mm to 4mm shown on fingertip, highlighting 3mm scale
14k yellow gold CZ flat back labret in five sizes from 2mm to 4mm, angled comparison view
14k gold 4mm diamond stud worn on model's earlobe with matching studs stacked in cartilage piercings
14k white gold 4mm CZ flat back labret, straight side profile showing post length and disc backing
14k white gold 4mm CZ martini-set flat back labret with CZ facing forward, angled view
Diagram comparing 16G and 14G threaded end versus 18G threadless push-pin closure styles in yellow gold
Four-step visual guide for inserting and removing an 18G threadless push-pin flat back labret
14k white gold 4mm CZ flat back labret disassembled, showing threaded CZ end separated from post
Close-up top-down view of 4mm CZ in martini prong setting, highlighting stone sparkle and four prongs
14k white gold 4mm CZ flat back labret with martini prong setting, angled product view
14k rose gold 4mm CZ flat back labret with martini prong setting, angled product view
14k yellow gold 4mm CZ flat back labret with martini prong setting, angled product view
CZ prong flat back studs worn on model's ear showing 2mm, 2.5mm, 3mm, and 4mm size comparison
Video thumbnail
Video thumbnail
4mm CZ prong-set flat back labret shown in model's medusa piercing, front face view
Flat back labret sizing guide showing 18G and 16G gauges from 5mm to 9.5mm with ear piercing map
14k yellow gold 4mm CZ labret shown in four barbell lengths: 5mm, 6mm, 8mm, and 9.5mm side by side
Round stone size comparison from 1.5mm to 4mm shown on fingertip, highlighting 3mm scale
14k yellow gold CZ flat back labret in five sizes from 2mm to 4mm, angled comparison view
14k gold 4mm diamond stud worn on model's earlobe with matching studs stacked in cartilage piercings
14k white gold 4mm CZ flat back labret, straight side profile showing post length and disc backing
14k white gold 4mm CZ martini-set flat back labret with CZ facing forward, angled view
Diagram comparing 16G and 14G threaded end versus 18G threadless push-pin closure styles in yellow gold
Four-step visual guide for inserting and removing an 18G threadless push-pin flat back labret
14k white gold 4mm CZ flat back labret disassembled, showing threaded CZ end separated from post
Close-up top-down view of 4mm CZ in martini prong setting, highlighting stone sparkle and four prongs
14k white gold 4mm CZ flat back labret with martini prong setting, angled product view
14k rose gold 4mm CZ flat back labret with martini prong setting, angled product view

Gemstone Size

4mm Cubic Zirconia
2mm Cubic Zirconia 2.5mm Cubic Zirconia 3mm Cubic Zirconia 3.5mm Cubic Zirconia 4mm Cubic Zirconia
Size Chart

Sizing Piercing Jewelry

Choosing the right size ensures comfort, healthy healing, and a flawless look. Use this guide to understand gauge, length, and diameter, then confirm your fit with the conversion charts below.

What Is “Gauge”?

The gauge of your piercing is the thickness of the bar that passes through your piercing—i.e., the barbell’s thickness. Note the system is inverse: a lower number = thicker bar. For example, a 12G barbell is thicker than a 20G barbell.

Piercing Jewelry “Length”

The length of your piercing jewelry refers to the wearable span of a straight or curved barbell—the section that sits inside the piercing. It’s measured end-to-end on the bar and excludes any ends, balls, or charms.

measuring length of a flat back earring measuring length of a nose ring



measuring length of a straight barbell measuring length of curved barbell


Piercing Jewelry “Diameter”

The diameter is used for circular styles—hoops, captives, clickers, seam rings, and circular barbells. Measure from the innermost, widest point across the inside of the hoop.

measuring diameter of captive bead ring measuring diameter of circular barbell

Standard Piercing Sizes

Check the chart below for typical starting sizes. Like clothing, anatomy varies—your ideal size may differ.

💡 Tip: Measure a comfortable piece you already wear to confirm your fit.


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Made to order: Ready in 1–2 weeks

Solid 14k Gold

Jeweler Direct

Handmade

Piercing Advisor

Ethical Luxury

Lifetime Warranty

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Product Description

Description

This cartilage earring has a dazzling 4mm cubic zirconia that will make your piercing stand out. The CZ on this flat back stud is has a gorgeous sparkle and the martini-style setting allows it to lay flat in the piercing. The comfortable disc backing makes it a great piece to wear in your cartilage piercings as well as lip, labret, and medusa piercings.

  • 4mm Cubic Zirconia | AAA grade 
  • Martini-setting | Low profile setting
  • Comfortable fit designed to lay flat in the piercing
  • Solid 14k gold | Nickel-free | Hypoallergenic
  • Comfortable 3mm disc backing
  • 18G features a Press-fit threadless post with a push-pin end.
  • 16G & 14G feature an Internally threaded post with a threaded end.
  • Commonly worn as a cartilage earring: helix, conch, tragus, earlobes; lip ring: labret, Monroe, medusa, snake bites; as well as a nose ring.
  • Ethically handmade in the USA

    Useful Tips: 
  • Choosing The Perfect Gem Flat Back
  • Body Piercing Jewelry Size Guide
Product Details
Materials
Shipping

Pairs Well With

14k yellow gold 4mm diamond flat back labret with martini prong setting, angled product shot 14k rose gold 4mm diamond flat back labret, overhead angle showing diamond fire and prong detail
4mm Diamond Low-Set Prong 14k Gold Flat Back Earring $1,072
14K yellow gold polished heart flat back labret, angled view showing barbell and disc backing 14K rose gold polished heart flat back labret, front view showing warm pink-gold finish
4mm Heart Artisan Polished 14K Gold Flat Back $169
14k yellow gold marquise diamond flat back labret stud with 4-prong setting, angled lifestyle shot 14k yellow gold marquise diamond flat back labret shown disassembled with threadless push-pin end
4mm Marquise Diamond Flat Back Stud $389
Flat back earring insertion tool beside a gold CZ flat back stud, showing tool and jewelry separately Insertion tool being used in a helix piercing on a model, with gold CZ chain connector studs in lobe
Flat Back Earring Easy Insertion Tool $14
14k yellow gold plain clicker ring hoop, front view with inset showing open clasp detail 14k rose gold plain clicker ring hoop, 12G front view with bold tube width and warm rosy finish
14k Gold Plain Hoop Clicker Ring $318

Jeweler-Direct Pricing

Jeweler-Direct means crafted, just for you. By skipping the middleman, we eliminate traditional retail markups — so you can enjoy luxury piercing jewelry without the inflated price.

Fresh Trends Price — $164

Est. Retail Value — $328

Fresh Trends Piercing Advisor™

Our complimentary Piercing Advisor™ service ensures your jewelry fits perfectly. After your order, a specialist reviews your selection, verifies your size, and guides you through any adjustments. For jewelry to be eligible for an adjustment, FreshTrends Piercing Advisor™ must be added to your cart at the time of original purchase.

Why It Matters:

• Anatomy varies, and size is crucial

• A specialist confirms your fit before we craft your piece

• You get a flawless, comfortable result—every time

Piercing Advisor Service

Handcrafted Just For You!

Our in-house jewelry designer and artisans create one-of-a-kind piercing jewelry from solid 14k gold and 950 platinum, always 100% nickel-free.

Each piece is made-to-order and never mass-produced, allowing for many gemstone and size options for the perfect fit. We take pride in hand-crafting fine body jewelry in the USA.

Fresh Trends Fine Jewelry

Because every piercing deserves its masterpiece.

Ready to Gift

Your jewelry arrives in our signature packaging—a keepsake box with a soft green pouch and a Wear & Care Guide. Premium pieces are showcased in an LED presentation box that elevates every gifting moment.

Fresh Trends Packaging

Fresh Trends® Lifetime Warranty

Every piece we craft is designed for lifelong wear. If your jewelry ever shows a manufacturing defect, we’ll repair or replace it—complimentary, for life.

Lifetime Confidence. Handmade Quality.

Gold earring with clear gemstones on a soft pink fabric background

Sustainable Jewelry

We use recycled metals to help reduce the carbon footprint of manufacturing and the negative impact of metal mining.

We plant one new tree per order in partnership with Ecologi to help restore nature and reduce the carbon footprint of our operations.

ecology

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